WO2013046339A1

WO2013046339A1 - Lighting apparatus

Info

Publication number: WO2013046339A1
Application number: PCT/JP2011/072082
Authority: WO
Inventors: 隆一古閑; 戸田　雅宏; 高橋　浩司; 賢二高梨; 誠二大里
Original assignee: 東芝ライテック株式会社
Priority date: 2011-09-27
Filing date: 2011-09-27
Publication date: 2013-04-04

Abstract

A lighting apparatus according to an embodiment is provided with: an apparatus body; a front-surface cover having a translucent section; a substrate housed within the apparatus body; a plurality of light-emitting elements positioned on the surface of the substrate which faces the front-surface cover of the substrate; a sensor for sensing external light, provided so as to face the front-surface cover of the substrate, and positioned on the same surface as the light-emitting elements are; and a shielding means for blocking the light from the light-emitting elements.

Description

lighting equipment

Embodiments of the present invention relate to a lighting fixture that uses a light emitting element such as an LED as a light source and can improve the heat dissipation of the light emitting element.

There are street lamps that use light emitting elements such as LEDs.

JP 2010-62005 A

When a sensor for detecting outside light is provided in a street light, there is a problem that the manufacturing cost increases, and there is a need for cost reduction.

The lighting fixture of the embodiment includes a fixture main body, a front cover having a translucent part, a substrate housed inside the fixture main body, a plurality of light emitting elements provided on a surface of the substrate facing the front cover, A sensor that is opposed to the front cover of the substrate and is provided on the same surface on which the light emitting element is provided, and that senses light from the outside, and shielding means for shielding light from the light emitting element.

According to the present invention, a reduction in manufacturing cost can be expected.

It is the perspective view which showed the lighting fixture which concerns on embodiment of this invention toward the upper surface side upwards. It is a perspective view which decomposes | disassembles and shows the front cover and packing of the lighting fixture shown in FIG. It is the front view which showed the lighting fixture shown in FIG. 1 from the front direction. FIG. 4 is a cross-sectional view of the lighting apparatus shown in FIG. 3 taken along line F4-F4. It is a perspective view which decomposes | disassembles and shows the lens of the lighting fixture shown in FIG. 2, a 1st board | substrate, a sensor cover, and a heat sink. It is sectional drawing which expands and shows the sensor cover vicinity of the lighting fixture shown in FIG. Sectional drawing which cut | disconnected in the direction parallel to a 1st board | substrate in the lighting fixture shown in FIG. 6, and showed the inside.

The lighting fixture according to the embodiment of the present invention will be described with reference to FIGS. The lighting fixture (illuminating device) of this embodiment is what is called a street lamp (security light) mainly used outdoors.

As shown in FIGS. 1 to 4, the luminaire 11 includes a main body (apparatus main body) 12, a front cover 13 having a translucent portion, a main body 12, and a continuous support for the main body 12. A mounting portion 16 for mounting on a structure 40 (such as an outdoor pillar), a first substrate 17 provided in the internal space 14 of the main body portion 12 on which the light emitting element 32 is mounted, and provided in the internal space 14 of the main body portion 12. The second substrate 18 on which the circuit component 33 is mounted, the support portion 21 that supports the second substrate 18 and is attached to the main body portion 12, and the back surface (the other surface 31B) of the first substrate 17 And a heat sink 22 supporting the first substrate 17, a lens 23 provided on the surface of the first substrate 17, and a ring-shaped packing interposed between the main body 12 and the front cover 13. 24 and a sensor 25 for sensing light from the outside world The sensor 25 covering the periphery of the sensor 25, the second lens 30 (see FIG. 6) interposed between the sensor cover 26 and the front cover (translucent portion) 13, and the noise of the sensor 25 are prevented. And a capacitor 42 for the purpose.

As shown in FIGS. 4 and 5, the first substrate (printed circuit board) 17 has one surface 31A facing the front cover (translucent portion) 13 and the other surface 31B on the opposite side. A substrate body 31, a plurality of light emitting elements 32 mounted on one surface 31 A of the substrate body 31, and a slit shape linearly provided on the substrate body 31 at a position between the plurality of light emitting elements 32 and the sensor 25. A through hole (concave portion) 28. Each of the light emitting elements 32 is composed of, for example, an LED. Further, as the light emitting element 32, a solid light emitting element such as an organic EL element can be applied. The amount of heat generated by the first substrate 17 accounts for approximately 80% to 90% of the total amount of heat generated by the lighting fixture 11. The surface of the first substrate 17 is painted white, for example, and the light reflection efficiency is good. Note that the shape of the through hole (recessed portion) 28 is not limited to a linear shape, and may be, for example, a shape surrounding the sensor 25 in a “U” shape.

The sensor 25 is a so-called illuminance sensor, and is composed of a chip component mounted on one surface 31A of the first substrate 17. The sensor 25 is located on the side opposite to the attachment portion 16.

As shown in FIG. 4, the second substrate (printed circuit board) 18 includes a plurality of circuit components 33 and circuits for lighting the plurality of light emitting elements 32. The second substrate 18 is supported by the support portion 21 at a position separated from the main body portion 12 (floating position). The second substrate 18 is supported at a position separated from a later-described partition plate 36. The second substrate 18 is connected to a power source outside the main body 12. In addition, the second substrate 18 is connected to the sensor 25, and when light from the outside is detected through the sensor 25 in the daytime (for example, when the illuminance of the outside is above a certain threshold value), the light emitting element. 32 is turned off. In addition, the second substrate 18 turns on the light emitting element 32 at night when the external light cannot be detected by the sensor 25 (for example, when the external illumination is below a certain threshold). The calorific value of the second substrate 18 accounts for approximately 10% to 20% of the calorific value of the entire lighting fixture 11.

As shown in FIG. 5, the heat radiating plate 22 is formed in an oval plate shape from metal, for example, iron. The heat radiating plate 22 is thermally connected to the main body portion 12 via a rib 34 and an edge portion 39 which will be described later. The lens 23 is integrally formed in a square plate shape with a translucent resin material. As shown in FIGS. 4 and 6, the lens 23 has a plurality of depressions 23 A and a plurality of protrusions 23 B at positions corresponding to the light emitting elements 32, and emits light from the light emitting elements 32 at a desired angle. To control the light distribution of the lighting fixture 11.

As shown in FIG. 1, FIG. 3, etc., the main body 12 is formed into a stepped box shape by metal, for example, aluminum die casting. As shown in FIG. 5, the main body 12 has a plurality of ribs 34 on both side surfaces at positions corresponding to a first space 14 A (described later) of the internal space 14. As shown in FIGS. 4 and 6, each of the plurality of ribs 34 protrudes from the inner surface of the main body 12 and is in contact with one surface of the heat radiating plate 22. The main body portion 12 suppresses an extreme increase in weight of the main body portion 12 while increasing the contact area with the heat radiating plate 22 by the ribs 34 to ensure good thermal conductivity. As shown in FIG. 4, the first substrate 17 is thermally connected to the main body 12 via the heat radiating plate 22 and the ribs 34.

As shown in FIGS. 1 and 2, the front cover 13 is formed in a hemispherical shape with a translucent resin material. The front cover 13 is fixed to the main body 12 by a fixing member such as a screw 35. As shown in FIG. 4, the internal space 14 of the main body 12 includes a first space 14A in which the first substrate 17 and the heat radiating plate 22 are provided, and a second space 14B in which the second substrate 18 is provided. And.

The support portion 21 includes a partition plate 36 that partitions the internal space 14 into a first space 14A and a second space 14B, and a locking support 37 for fixing the second substrate 18 to the partition plate 36. Yes. As shown in FIGS. 4 and 6, the partition plate 36 is provided at a position between the first substrate 17 and the second substrate 18, and a total of four bosses 38 protruding from the main body portion 12 are provided. On the other hand, it is fixed with screws or the like. As shown in FIG. 5, the partition plate 36 is formed in a rectangular plate shape by, for example, a synthetic resin material, and fixedly supports the second substrate 18. The partition plate 36 not only partitions the internal space into the first space 14A and the second space 14B, but also insulates the second substrate 18 from the main body 12 and causes the second substrate 18 caused by lightning strikes or the like. It also plays a role in preventing breakdowns.

The locking support 37 is formed of a resin material such as nylon. The locking support 37 has a pair of return portions 37A, and the second substrate 18 can be sandwiched and held between the return portions 37A. The second substrate 18 is fixedly held in the second space 14 B of the internal space 14 of the main body 12 by the partition plate 36 and the locking support 37. As described above, the lighting fixture 11 of the present embodiment employs a structure in which the second substrate 18 is thermally isolated as much as possible from heat-generating components such as the light emitting element 32.

The sensor cover 26 is an example of a shielding means. As shown in FIGS. 5 and 6, the sensor cover 26 includes a sensor cover main body 26A, a daylighting portion 27 having a duct shape extending from the sensor 25 to the front cover (translucent portion) 13, and a sensor cover main body 26A. And a protrusion 29 protruding so as to fit inside the through hole 28. The daylighting unit 27 is provided on the side opposite to the plurality of light emitting elements 32 when viewed from the sensor 25. The daylighting portion 27 is formed such that the inner diameter (opening area) in the thickness direction of the first substrate 17 gradually increases as the front cover (translucent portion) 13 is approached. Further, the duct-shaped daylighting unit 27 extends in a direction intersecting with the light irradiation direction of the plurality of light emitting elements 32.

The sensor cover 26 is formed with a predetermined thickness, for example, of black or other dark synthetic resin material. The sensor cover 26 can prevent light from the light emitting element 32 from being transmitted to the sensor 25 side, and can exhibit light absorption on the surface of the sensor cover 26. The material of the sensor cover 26 is not limited to this, and any material can be used as long as the surface can exhibit light absorption. In addition, a light-absorbing paint is applied to the surface of the sensor cover 26 or a light-absorbing tape is affixed to the surface of the sensor cover 26 so that the surface of the sensor cover 26 exhibits light absorption. May be. Furthermore, a light-absorbing paint is applied only on the outer surface of the sensor cover 26 (the surface opposite to the surface facing the first substrate 17) or a light-absorbing tape is applied, The light reflection efficiency may be maintained at a high level without providing the paint or the tape inside the daylighting unit 27, so that external light may be actively guided to the sensor 25.

As shown in FIGS. 6 and 7, the second lens (wide-angle lens) 30 is formed in a substantially frustum shape with a front cover (translucent portion) 13 as a bottom surface, for example, of a translucent resin material. . In other words, the second lens 30 becomes narrower as it approaches the sensor 25 in the direction parallel to the first substrate 17 (width direction W of the lighting fixture 11) and the thickness direction of the first substrate 17. . The second lens 30 having such a shape can take light from the outside world at a wide angle and guide it toward the sensor 25.

Subsequently, the operation of the lighting apparatus of the present embodiment will be described with reference to FIGS. In the lighting fixture of the present embodiment, the daylighting portion 27 of the sensor cover 26 extends in a direction intersecting with the light irradiation direction of the light emitting element 32 (more specifically, a direction substantially orthogonal) as described above. Therefore, as shown in FIG. 6, for example, even when light irradiated obliquely from the light emitting element 32 is irregularly reflected between the first substrate 17 and the front cover (translucent portion) 13, such light is It rarely reaches the sensor 25 through the daylighting unit 27. Further, since the surface of the sensor cover 26 has a light absorption property, the light irregularly reflected between the first substrate 17 and the front cover (translucent portion) 13 is, as shown in FIG. When it is irradiated, it attenuates extremely.

Further, light from the outside world is collected at a wide angle by the second lens 30 and guided to the sensor 25. For this reason, the brightness state of the outside world can be sufficiently detected by the sensor 25, and malfunctions such as lighting in the daytime and not lighting at night are prevented as much as possible. Further, as shown in FIG. 6, since the convex portion 29 of the sensor cover 26 is fitted in the through hole (concave portion) 28 of the first substrate 17, the surface (one surface 31A) of the first substrate 17 and the lens The light propagating in the minute air layer between the two is blocked by the convex portion 29 and is not transmitted to the sensor 25.

According to the first embodiment, the luminaire 11 includes a main body (apparatus main body) 12, a front cover 13 having a translucent portion, a substrate housed in the main body (apparatus main body) 12, and the front surface of the substrate. A plurality of light emitting elements 32 provided on a surface facing the cover 13; a sensor 25 facing the front cover 13 of the substrate and provided on the same surface on which the light emitting elements are provided; Shielding means for shielding light from the light emitting element.

According to this configuration, since the plurality of light emitting elements 32 and the sensor 25 are provided on the same substrate, the number of substrates can be reduced and the manufacturing cost can be reduced. In addition, since the plurality of light emitting elements 32 and the sensor 25 are provided on the same surface of the same substrate, a window for allowing light to pass through the main body portion 12 is provided in a portion other than the light transmitting portion, or the window is waterproof. No processing is required. Therefore, the manufacturing cost can be reduced also in this respect. Furthermore, since the sensor cover 26 having the daylighting portion 27 is provided on the side opposite to the plurality of light emitting elements 32, the sensor 25 reacts with the light from the plurality of light emitting elements 32, and the lighting fixture 11 malfunctions. There is no end.

Further, the daylighting portion has a duct shape extending from the sensor 25 to the light transmitting portion. According to this configuration, it is possible to partition the space inside the daylighting portion 27 from the space in the main body portion 12, further increasing the risk that the light from the plurality of light emitting elements 32 will accidentally reach the sensor 25. Can be reduced.

The daylighting unit 27 extends in a direction crossing the light irradiation direction of the plurality of light emitting elements 32. According to this configuration, since the daylighting unit 27 extends in a direction substantially intersecting with the direction of light irregularly reflected between the translucent part and the substrate by the light from the plurality of light emitting elements 32, the daylighting unit Even if such irregularly reflected light enters 27, the risk of the light reaching the sensor 25 can be further reduced.

The luminaire 11 includes a concave portion provided on the substrate at a position between the plurality of light emitting elements 32 and the sensor 25, and a convex portion 29 provided on the sensor cover 26 and fitted in the concave portion. According to this configuration, it is possible to prevent light propagating along the substrate direction from entering through a minute gap between the substrate and the sensor cover and being sensed by the sensor 25. As a result, it is possible to further reduce the risk of causing malfunctions such as repeated blinking by sensing the light of the lighting device 11.

The luminaire 11 includes an attachment portion 16 for attaching the main body portion 12 to the outer support structure 40, and the sensor 25 is positioned on the opposite side of the attachment portion 16 on the surface facing the light transmitting portion of the substrate. . According to this configuration, the sensor 25 is not disposed in the shadow of the support structure 40 outside the main body 12, and a problem that the sensor 25 cannot accurately sense the external environment can be prevented.

The luminaire 11 includes a wide-angle lens interposed between the translucent part and the sensor 25. According to this configuration, it is possible to collect light from a wider range from the outside world, and thereby it is possible to detect the brightness situation of the outside world with higher accuracy.

The surface of the sensor cover 26 has light absorption. According to this configuration, even if light diffusely reflected inside the main body 12 goes in the direction of the sensor cover 26, the light is absorbed by the sensor cover 26, and this light is mistakenly entered into the daylighting unit 27. The risk of entering can be reduced.

Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 11 ... Lighting fixture, 13 ... Front cover (translucent part), 17 ... 1st board | substrate (board | substrate), 27 ... Daylighting part, 28 ... Through-hole (recessed part), 29 ... Convex part, 30 ... 2nd lens ( Wide-angle lens), 31A ... one surface, 32 ... light emitting element, 40 ... support structure.

Claims

An instrument body;
A front cover having a translucent portion;
A substrate housed inside the instrument body;
A plurality of light emitting elements provided on a surface of the substrate facing the front cover;
A sensor that is opposed to the front cover of the substrate and is provided on the same surface on which the light emitting element is provided, and that senses light from the outside,
Shielding means for shielding light from the light emitting element;
A lighting fixture comprising:
The lighting apparatus according to claim 1, wherein the shielding means is a sensor cover that covers the periphery of the sensor and has a daylighting portion on the side opposite to the plurality of light emitting elements.
A recess provided in the substrate at a position between the plurality of light emitting elements and the sensor;
A convex portion provided in the sensor cover and fitted in the concave portion;
The lighting fixture of Claim 2 provided with these.
An attachment portion for attaching the instrument body to an external support structure;
The lighting device according to claim 3, wherein the light emitting element is positioned on the support structure side, and the sensor is positioned on a side of the substrate facing the translucent portion and separated from the support structure.